PROGRESS REPORT NO. 53: FOR PHYSICS, JUNE 1, 1958 THROUGH AUGUST 31, 1958 AND FOR CHEMISTRY, JUNE 1, 1958 THROUGH OCTOBER 31, 1958
Among chemical studies are reported investigations of mixed ligand complexes, lower valence states of In, hydroxide and cyanide complexes of leads tungstate equilibria, niobium electrochemistry, and reactions in fused salt media. Instrumental and theoretical studies are represented by flame photometry, photometric titrations, coulometry, millicoulometry, silver electrode potentiometry, hanging drop polarography, irreversible electrode reactions, luminescence spectrophotometry, and gas chromatography. In the Nuclear Chemistry (Inorganic) Group, a major effort is being expended on the study of water and electrolyte uptake of ion-exchange resins. Interest continues in the decay properties of short lived nuclides, especially of the fission products. Two separate studies are in progress on the fission process, one on the distribution of nuclear charge in the fission of U/sup 235/ with deuterons and alpha particles, and one on the separation and estimation of Kr and Xe fission products. In the Nuclear Chemistry (Organic) Group, work is in progress on the rate of reaction of triphenylmethyl chloride with tritium-labeled methanol in benzene solution, the mecbanism of enolization of ketones, tritium isotope effect in the reaction of benzoyl peroxide with hexaphenylethane in benzene-t at 25 , interchange of oxygens in triphenylmethyl benzoate under ionizing conditions, the structure of water solutions of methyl halides, isotope effects on the nucleophilic reactivity of anions in the decomopsition of sulfonium salts, the mechanism of the Camizzaro reaction, decomposition of peroxygen compounds, the Bamford-Stevens reaction in D/sub 2/O, and stereospeciiicity in free radical chain reactions. Progress on work programs in the Cosmic Ray Group is indicated. Results from an analysis of cloud chamber pictures on the helicity of the protons from Svlvania Electr decay are summarized. A Forbush decrease was detected on July 8, 1958 with the large meson monitor. Instruments for measuring extensive air showers, lowenergy cosmic gamma rays, and the Svlvania Electr gyromagnetic ratio are described. In the High Energy Accelerator Physics Group, work is reportcd on a study of n-p and p-p pairs in a complex nucleus via The effects of - capture and measurement of K+ scattering on protons and neutrons using a beam from the Berkeley Bevatron. The Linear Accelerator Group has been investigating the beam characteristics of the electron gun at the entrance of the linac. The work of the Rockefeller Generator Group was concerned with adaption of the generator to pulsed operation together with the development of associated electronic equipment and continuation of "g" factor investigations. The ONR Generator Group bombarded natural titanium targets with 6.0 and 6.5 Mev protons, and spectra of protons and alpha particles emitted at 30, 60, and 90 degrees were analyzed. Using the method of magnetic h.f.s. polarization the Radioactivity Group oriented the nuclei Co/sup 58/, Co/sup 60/, and Mn/sup 56/ in the solid state. The angular distribution of the gamma rays emitted from the polarized nuclei was observed. A series of measurements was completed by the Cyclotron Group on the polariiation of 7.5-Mev protons from C, Al, Cu, and Ni. The angular distributions for deuteron elastic scattering from Ni, Nb, Rh, Pd, and Sn were obttiined. Several ( alpha ,d) ground state to ground state angular distributions were measured using a very thin NaI crystal spectrometer. The Theoretical Group has become more and more interested in the many-body problem. Contribution in this direction has been made in the field of nuclear reactions; and in the theory of nuclear matter; and in thc theory of superfluidity. There has been a continuing work in the energy levels of nuclei and meson theories. (For preceding period see AECU3772.) W.D.M.)
- Research Organization:
- Massachusetts Inst. of Tech., Cambridge. Lab. for Nuclear Science
- DOE Contract Number:
- AT(30-1)-2098; AT(30-1)-905
- NSA Number:
- NSA-13-014583
- OSTI ID:
- 4244318
- Report Number(s):
- AECU-4139
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-59
- Country of Publication:
- United States
- Language:
- English
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PROGRESS REPORT NO. 54 COVERING THE PERIOD FOR PHYSICS AND CHEMISTRY THROUGH APRIL 30, 1959
PROGRESS REPORT NO. 60 ON NUCLEAR RESEARCH
Related Subjects
ACCELERATORS
ALDEHYDES
ALPHA PARTICLES
ALUMINUM
ANGULAR DISTRIBUTION
BEAMS
BENZENE
CANNIZZARO REACTION
CAPTURE
CARBON
CHEMICAL REACTIONS
CHROMATOGRAPHY
CLOUD CHAMBERS
COBALT 58
COBALT 60
COMPLEXES
COMPOUNDS
COPPER
COSMIC RADIATION
COULOMETRY
CRYSTALS
CYANIDES
DECAY
DECOMPOSITION
DETECTION
DEUTERONS
DISTRIBUTION
ELECTRIC POTENTIAL
ELECTROCHEMISTRY
ELECTRODES
ELECTROLYTES
ELECTROLYTIC CELLS
EMISSION
ENERGY LEVELS
EXTENSIVE AIR SHOWERS
FISSION
FISSION PRODUCTS
FORBUSH DEPRESSION
GAMMA RADIATION
GASES
GYROMAGNETIC RATIO
HALIDES
HEAVY WATER
HYDROXIDES
INDIUM
INSTRUMENTS
ION EXCHANGE
IONIZATION
IONS